List 类可以使用 grouped 方法:http://www.scala-lang.org/api/current/index.html#scala.collection.immutable.List

You may use grouped method for the List class: http://www.scala-lang.org/api/current/index.html#scala.collection.immutable.List

list.grouped(2).toList.collect { case a :: b :: Nil => (a,b) }
res1: List[(Int, Int)] = List((1,2), (3,4), (5,6), (7,8), (9,10))

collect 用于将列表列表转换为元组列表.

collect is used to convert list of lists to list of tuples.